The author in this paper looked at the nature of the crime that happened in the Baltimore city in the State of Maryland at the micro-level. In 2000, Baltimore County ranked in the third place regardless the population. Since of the high population the percentage of the crime is also high. There is a relationship between the crime and the population and the opportunity of theory is implied. The writer used the 2000 crime data for Baltimore city with GIS to analyze the nature of the crime. Moreover, the unit of the analysis is block. In addition, 6 clusters of blocks were used in the study. The result shows that around 259 blocks satisfied the gradient standard. Using the hot spot to represent the data is very important since the nature of the
